银氧化锡触点材料的水热制备及组织分析

利用水热法制备AgSnO2粉体,压制烧结后制得AgSnO2块体样品. 对AgSnO2粉体样品进行X射线衍射、扫描电镜和能谱分析,结果表明:通过在溶液体系中实现银和二氧化锡的共沉积,水热法能制得颗粒细小均匀的球形AgSnO2复合粉体. 块体样品X射线衍射谱表明,水热法制备的AgSnO2粉体由于改变了Ag和SnO2的结合状态,烧结时二氧化锡晶体在(110)晶面上表现出一定的择优取向. 对块体样品的显微组织分析表明,AgSnO2块体样品能够克服氧化物的聚集,二氧化锡颗粒在银基体中均匀弥散分布.

Hydrothermal preparation and microstructure analysis of silver tin oxide contact materials

After AgSnO2 powders prepared by hydrothermal method being pressed and sintered,AgSnO2 contact materials were obtained.X-ray diffraction,scanning electron microscopy(SEM) and energy-dispersive X-ray(EDX) analysis were used for the AgSnO2 powders.It is indicated that AgSnO2 composite powders with finer size and spherical can be prepared by hydrothermal method by means of the co-precipitation of Ag and SnO2 in aqueous systems.As a result of changing the combination states of silver and tin oxide,the tin oxide crystals show preferred orientation in(110) plate by X-ray diffraction.Microstructure analysis by optical micrograph shows that the AgSnO2 composite bulks have the microstructure with SnO2 particles dispersed on the silver matrix equably.